A series of murders in Michigan lead an American secret agent to Amsterdam, where he uncovers a plot to imperil the world with a potent new drug.
Ray Danton
as Bryan Cooper / Superdragon
Marisa Mell
as Charity Farrel
Margaret Lee
as Cynthia Fulton
Jess Hahn
as Baby Face
Carlo D'Angelo
as Fernand Lamas
Adriana Ambesi
as Verna
Marco Guglielmi
as Prof. Kurge
Solvi Stübing
as Elizabeth
Gérard Herter
as Coleman (as Gerard Haerther)
Jacques Herlin
as Ross
Carlo Hintermann
as Coleman
Pinkas Braun
as (uncredited)
